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Interpretation of electrospray/ion trap mass spectra of bile acids and other surfactants

✍ Scribed by M. Alejandra Rodríguez; Richard A. Yost

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 77 KB
Volume: 14
Category: Article
ISSN: 0951-4198
DOI: 10.1002/1097-0231(20000815)14:15<1398::aid-rcm37>3.0.co;2-e

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✦ Synopsis

Electrospray spectra of various bile acids and other surfactants were obtained using an ion trap instrument. Bile acids and bile acid derivatives such as 3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate (CHAPS) self associate to form micelles in a stepwise process. Their spectra show a distinct pattern of aggregation, with ions evenly separated in the m/z space. A new parameter, n/z, can be used to characterize such ions, where n is the number of molecules and z is the charge of the aggregate. The values of z were determined using multi-stage mass spectrometry (MS(n)) and high resolution in the ion trap.

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